MULTI-WAVELENGTH OBSERVATIONS OF A SUBARCSECOND PENUMBRAL TRANSIENT BRIGHTENING EVENT

	MULTI-WAVELENGTH OBSERVATIONS OF A SUBARCSECOND PENUMBRAL TRANSIENT BRIGHTENING EVENT
	Bai, X. Y.1,2; Su, J. T.2 ; Cao, W. D.3; Liu, S. Q.1; Deng, Y. Y.2 ; Priya, T. G.2,4
刊名	ASTROPHYSICAL JOURNAL
	2016-05-20
卷号	823 期号:1
关键词	methods: observational Sun: chromosphere Sun: corona Sun: magnetic fields Sun: transition region
英文摘要	We report a subarcsecond penumbral transient brightening event with the high-spatial resolution observations from the 1.6 m New Solar Telescope (NST), Interface Region Imaging Spectrograph (IRIS), and the Solar Dynamics Observatory. The transient brightening, whose thermal energy is in the range of nanoflares, has signatures in the chromosphere, the transient region, and the corona. NST's H alpha channel reveals the fine structure of the event with a width as narrow as 101 km (0 ''.14), which is much smaller than the width from the previous observation. The transient brightening lasts for about 3 minutes. It is associated with a redshift of about 17 km s(-1), found in the Si IV 1402.77 angstrom line and exhibits an inward motion to the umbra with a speed of 87 km s(-1). The small-scale energy released from the event has a multi-temperature component. Spectral analysis of the brightening region from IRIS shows that not only the transition region lines such as Si IV 1402.77 and C II 1334.53 angstrom, but also the chromospheric Mg II k 2796.35 angstrom line are significantly enhanced and broadened. In addition, the event can be found in all the extreme-ultraviolet passbands of the Atmospheric Imaging Assembly and the derived differential emission measure profile increases between 4 and 15 MK (or 6.6 <= log T <= 7.2) in the transient brightening phase. It is possible that the penumbral transient brightening event is caused by magnetic reconnection.
收录类别	SCI
语种	英语
WOS记录号	WOS:000377216300060
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5341]
专题	国家天文台_太阳物理研究部
作者单位	1.Chinese Acad Sci, Space Environm Predict Ctr, Natl Space Sci Ctr, 1 Nanertiao, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, 20 Datun Rd, Beijing 100012, Peoples R China 3.New Jersey Inst Technol, Big Bear Solar Observ, Big Bear City, CA 92314 USA 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Bai, X. Y.,Su, J. T.,Cao, W. D.,et al. MULTI-WAVELENGTH OBSERVATIONS OF A SUBARCSECOND PENUMBRAL TRANSIENT BRIGHTENING EVENT[J]. ASTROPHYSICAL JOURNAL,2016,823(1).
APA	Bai, X. Y.,Su, J. T.,Cao, W. D.,Liu, S. Q.,Deng, Y. Y.,&Priya, T. G..(2016).MULTI-WAVELENGTH OBSERVATIONS OF A SUBARCSECOND PENUMBRAL TRANSIENT BRIGHTENING EVENT.ASTROPHYSICAL JOURNAL,823(1).
MLA	Bai, X. Y.,et al."MULTI-WAVELENGTH OBSERVATIONS OF A SUBARCSECOND PENUMBRAL TRANSIENT BRIGHTENING EVENT".ASTROPHYSICAL JOURNAL 823.1(2016).